Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57f83af20e2b115…

MALICIOUS

PDF

73.1 KB Created: 2021-04-02 14:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ed066a0c593dfe92365ddebe09a21df SHA-1: 733317652e85a68bcee2f12baa208539c8b3d016 SHA-256: f57f83af20e2b115b615dece09b8a7a889dd92e8b18757027baa179c83966e56
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing embedded URLs, one of which is directly associated with the document's apparent content (a soundbar manual). The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/wix?keyword=onn+16+2.0+channel+soundbar+manual
    • http://gejejok.iblogger.org/large_format_film_cameras_for_sale.pdf
    • http://niburufajanuto.sportsontheweb.net/boss_br_1600_cd_kaufen.pdf
    • https://tumunonapuve.weebly.com/uploads/1/3/1/3/131379134/9744488.pdf
    • http://redirerer.medianewsonline.com/relojofeluzozewumeja.pdf
    • http://lomidal.mygamesonline.org/how_to_factory_reset_onkyo_tx-nr609.pdf
    • http://xazixovabifin.medianewsonline.com/musubabub.pdf
    • http://vebilodugisugod.iblogger.org/22798033869.pdf
    • https://fikifiwokadekaw.weebly.com/uploads/1/3/4/5/134585034/5d7fc6515876a.pdf
    • http://pagowaxukixa.iblogger.org/protein_structure_and_function_petsko_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nazowovemozugiv.myartsonline.com/pdf_file_url_example.pdf
    • http://wevefudizob.rf.gd/29010782997.pdf
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_ce8053fe09d44a0f84e2311e5cfdb599.pdf?index=true
    • https://ba5d4ca7-777b-4ff7-855d-60fc8da7b8b2.filesusr.com/ugd/29a726_e022be65e6a845529656f406e22c1f07.pdf?index=true
    • http://rafodize.rf.gd/kopuvobipozajufuvalebav.pdf
    • https://590703a0-be71-4d3c-a49f-17767d5969ef.filesusr.com/ugd/656c20_3d2348823e9648e596f06abb9a1683bf.pdf?index=true
    • http://zumaborelap.rf.gd/93333068478.pdf
    • http://worubag.epizy.com/crazy_machines_android_full.pdf
    • http://gejigeral.rf.gd/variedades_linguisticas_diastrticas.pdf
    • http://muweluboxakok.rf.gd/14282530700.pdf
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_5d2a8e03d61543aca16359e82d201eb9.pdf?index=true
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_e3c6bed2f899402aa13bc3f90c12242a.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da63.bin
0bf9367730b0b89f545cb5162edbd4b995a28bcfa8d4275e84973560ee03b87e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA63 5860 bytes
font_01_sfnt_off0000ee29.bin
a01d1276cf156861d035074937c0ec1cd836c2976a2a187654bec10b1b359ead		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE29 11900 bytes

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